Finding the Fourth Proportional to 2,186.04, 3,016.72 and 1,191.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,186.04 : 3,016.72 = 1,191.31 : x
2. Step 2: Convert to fraction form
   2,186.04/3,016.72 = 1,191.31/x
3. Step 3: Cross multiply
   2,186.04x = 3,016.72 × 1,191.31
4. Step 4: Simplify right side
   2,186.04x = 3,593,848.70
5. Step 5: Solve for x
   x = 3,593,848.70/2,186.04
6. Step 6: Final answer
   x = 1,644.00